Disk rolling machine



Sept l l L' T. PEDIGO DISK NG MA Illilllllllll `Illlllll Illillllm Illlllnw Sept. 15, 1936. T, pEDlGO 2,054,712

DISK ROLLING MACHINE Filed April 25, 1935 5 Sheets-Sheet 2 /'A I Z' Nj I || tlIlllllIllHlHll Sept 15, 19.36 L.. T. `PEDIGO 2,054,712

I DISK ROLLING MACHINE Filed April 25, 1935 5 Sheets-Sheet 5 N u n I @1% 3,5%" l /l k/ Gmwmp Sept.. 1.5, 1936. L, T, PED|GO I -1?.,054-,712

DISK ROLLING MACHINE Filed April 2.5, 1935 5 sheets-sheet 4 l t lll,

wv 1 I l g w' N u N A wml o l l lia 3 @wm/wko@ 7i Pedz. R QE 3 Sept. 15, 1936. j T PEDlGQ '2,054,712

DISK ROLLING MACHINE Filed April 25, 1955 Y 5 Sheets-Sheet 5 Patented Sept. 15, 1936 UNITED STATES PATENT OFFICE 11 Claims.

This invention relates to a disk rolling machine, and more particularly to a machine by use of which marginal edge portions of disks such as used uponv plows and harrows may be rolled when dul-l inorder to restore a sharp edge which will easily penetrate the ground when a ploworharrovvismuse'.v l i* -7 One object of the invention is to'provide a machine of this character by means of which a rolling action under pressure may be applied circumferential-ly of av disk aboutthe marginal edge thereof and cause a dulled disk to have its marginal portion tapered toward its edge and thus sharpened without heating the disk which would spoil its temper and without cutting the disk through the medium of a file, grindstone, or other abrading element. A

Another object of the invention is to-so construct the machine that one of` the rollers between which marginal portions of a disk moves may-be forced toward the companion roller by hydraulic pressure set up by a manually operated device which is easy to actuate and thus provide a manually operated machine which may be very easily operated by one person. 1

Another object of the invention is to so construct the means for applying hydraulic pressure that the pressure applied may be accurately controlled and very easily increased or reduced when necessary and thus permit pressure to be gradually increased during a rolling operation and easily and quickly released when a sharpening operation has been completed.

Anotherv object of the invention is to provide improved means for rotatably supporting a disk to be sharpened and so construct and mount the roller supporting means that a disk carried thereby may be disposed at a'desired angle relative to the rollers andshifted toward and away from the rollers duringa sharpening operation.

Another object of the invention is to provide a machine of this character which will be compact in construction and very strong and durable.

The invention is illustrated inthe accompanying drawings, wherein Figure 1 is a perspective View of the improved disk rolling machine. v

Figure 2 is a vsection taken vertically through the machine adjacent one end thereof. Y

Figure. 3 is a sectional view taken vertically through the machine in the plane of the roller carrying shafts. Y

Figure 4. isa sectional View taken horizontally through the machine along the line 4-4 of Figure 2. Y

(Cl. 'I6-89.2)

Figure 5 is a fragmentary view taken along the line 5-5 of Figure 3 andillustrating the manner of constructingv and mounting the bearing blocks for the roller carrying shafts.

Figure 6 is an enlarged fragmentary sectional view taken vertically through a corner post. in which the'pump for exerting hydraulic pressure is mounted.

Figure 7 is a sectiontaken along the line I-'I of Figure 3l.

Figure 8 is a section taken along the line 8-8 of Figurev 7. K Y

Figure 9 is a section taken along the line 9--9 of Figure 8. Y Y

Figure 10 is a fragmentary view showing in botto-m plan one of the supporting legs and a corner portion of the frame.

This improved disk rolling machine has a frame including a lower plate or base; I and an upper plate or top 2,V the corner portions of which are formed with openings through which are passed the reduced and threaded upper and lower end portions of the cornervposts or standards 3 and 4, and referring to Figure 2 it Will be seen that lower end portions of the corner posts carry sleeves or collars 5 against which the bottom plate is secured by Vnuts 6 which also' serve to firmly secure feet 1 about the posts against` the under face of the bottom plate. These feet or legs extend downwardly at an outward incline from the bottom plate and are formed with openings 8 through which bolts may pass in order to firmly but detachably secure the machine upon a foundation. The upper plate 2 is also secured upon the corner posts or standards by nuts 9, and referring to Figures 1 and 2 it will be seen that uppersleeves I are provided about the standards 3 to engage the under face of the top plate 2, Whereas the posts or standards 4 are formed near their upper ends with shoulders, II upon which the upper plate rests. Before the nuts of the standards 4 are applied, a head block vor cross beam I2 is set in place upon the upper plate and, therefore, the nuts carried by upper ends of the posts 4 will serve to hold the head block in place, as Well as the upper plate. A11 of the corner posts or standards have been shown in the form of tubes. This not only reduces the weight of the machine, but also adds to its strength and permits one of the posts 4 to be plugged at its upper and lower ends,'as shown at I3 and I4, and serve as a container or reservoir for oil or any other liquid forming a Y portion of the hydraulic pressure applying mechanism to be hereinafter described.v

Bearing blocks I and I6 extend transversely of the frame between companion standards 3 and 4 and are arranged in pairs, as shown clearly in Figures 1 and 5. Referring particularly to Figure 5 it will be seen that each bearing block has arcuate shoes |1 at its ends which extend partially about the standards 4 and, therefore, serve to hold the bearing blocks in place between the companion standards but permit the bearing blocks to be slid into and out of place. It will also be noted that this manner of mounting the bearing blocks permits the blocks extending between the standards 4 to be forced downwardly when pressure is applied to sharpen a disk, as will be hereinafter fully set forth. The bearing blocks terminate in spaced relation to theupper plate and the bearing blocks between the standards 3 are overlapped by the sleeves, IIJ so that theseA blocks will be firmly held against vertical movee ment when the machine is assembled. j Abutting faces of the bearing blocks have their intermediate portions formed with recesses |8 which cooperate to forma pocekt I9 in which bushings 2l! are mounted and held against rotation by the flat faces of the pockets and the bushings. Through these bushings are rotatably mounted upper andlower shafts 2| and 22 carrying gears 23 by means of which rotary motion is transmittedfrom, one shaft to the other.,Y Outer end portions'of the shafts project from the bearing blockscarried by the standards 4 and upon these projecting end portions of the shafts are mounted rollers 24 which are formed Aof very hard metal and secured by nuts 25, it beingl understood that the rollers will be firmly fixed to the shafts in any desired manner' so that they will rotate with the shafts. Y Y

The two shafts 2| and 22 are to be rotated during operation of the machine and in order to do so there has been provided a drive shaft 26 which is rotatably mounted in bearings 21 bolted to the upper plate 2. 'I'his drive shaft projects from the frame at the opposite side thereof from the rollers 24 and carries a pulley 28 about which a belt 29 engages so that rotary motion may be imparted to the drive shaft from a motor or other source of power. A gear' housing 3|] formed of separable sections is secured vertically against the frame with the shaft 26 extending through the upper portion of the gear housing and an end portion of the shaft 22 `extending into its lower portion, as clearly shown in Figure 3. Sprockets 3| and 32 are carried by the portions of the shafts 26 and 22Ywithin the gear housing or shield and about these sprockets is trained a sprocket chain or toothed belt 33 by means'of which rotary motion is transmitted from the shaft 26 to the shaft 22. The shield or housing 30 entirely encloses the two sprockets and the sprocket chain or toothed belt thus preventing danger of the belt or chain slipping off of the sprockets and also eliminating danger of a person being injured by contact with the sprocket chain or by being struck by the chain or belt if it shouldrbreak.

A disk which is to be sharpened is to be rotatably supported at a side of the frame in operative relation tothe rollers 24 and angularly adjusted in 'order to dispose lit in proper angular relation to the'rollers. The means 'for supporting a disk includes a'bracket 34 having va solid shank 35 which i's slidably mounted in bearings 36 and 31 bolted tothe lower plate I. The bearing 31 has upstanding ears 38 through which a bolt 39 passes 'and upon the bolt is mounted a disk 46 which fits into a groove 4| formed longitudinally in the bracket may be slid longitudinally to dispose .a disk in proper spaced relation to the side of the frame and when the bolts are tightened to secure the bracket in a set position, the disk 40 will prevent turning of the shank in the bearings 35 and 31 and the disk being sharpened will be prevented from moving out of an angularly adjusted position. At its outer end, the shank 34 carries a head 42 having clamping jaws 43, through the free ends of which is passed a bolt 44 in order that the jaws may be drawn into gripping engagement with the shank 45 of a companion clamp This clamp 46 extends transversely of the bearing bracket 34, and between the jaws 41 Vof the clamp 46 extends the shank 48 of a plate or platform ,49. By loosening the bolt 58, the table 49 may be vertically adjusted and the bolt retightened to secure it in the adjusted position, and by loosening the bolt 44 the table may be shifted to an angularly adjusted position and then secured by retightening the bolt. It will thus be seen that the. platform lor table 49 Ymay be adjusted for height and distance away from the rollers 24 and may also be angularly adjusted in order that a disk to be sharpened may have its marginal portion properly engaged between the rollers.

The disk 5|, which is to be sharpened, is dis posed about a post or axle'52 where it rests upon wheels 53 rotatably connected with arms 54 which radiate from a hub 55, thearms and Vhub being formed integral with a circular disk or plate 56 resting upon the shelf or table 49 where it is se-V cured by bolts 51 and 58. The hub 55 is hollowed from its under face to form a pocket or bearing in which is disposed the circular foot 59 f at the lower end of the post 52 and this foot has its upper face formed with an annular race to receive bearing balls 60 and thus permit the post to rotate freely relative to the plate 56. After the disk 5| has been set in place with its concaved face resting upon the whe`ele 53, a tapered block 6| is passed downwardly about the post through the center opening of the disk until it has tight wedging engagement with the disk and a tapered retainer or key 62 is driven through a slot 63 formed transversely of the post to firmly hold the block in place. A cotterpin or equivalent removable fastener is then passed through one of the opeings 63 of the key 62 to hold this key in place. It will thus be seen that the disk 5| and thepost 52 will rotate as a unit with the disk resting upon the wheels 53 and rotation of the post being adjusted by the bearing balls 60. It is desired to permit the disk 5| to be shifted toward and away from the rollers 24 during a sharpening operation and, therefore, the plate 56 has been provided with a handle 64 which extends radially therefrom and at its inner end is formed with a foot 65 which rests upon the plate 56 and is secured thereon by a screw 66 and by the bolt 51. This bolt 51 passes through a slot 61 which is arcuate, as shown invFigure 9, and referring'partieularly to Figure '1 it will be seen that the slot 61 is concentric to the opening through which Vthe bolt 58 passes but eccentric to the shankY 48. Therefore, by loosening the bolt 51 and grasping the handle 64, the plate 56 may be swung about the bolt 58 as a pivot to shift the disk 5| toward or away from the rollers 24 and the bolt 51 then again tightened to hold the plate 56 and post 52 in an adjusted position. Y

When this machine is in operation, the disk to be sharpened is applied to the post 52 and proper adjustments made to dispose the marginal portion of the disk between the rollers 24. The shaftsY 2| and 22' are rotated from: thedrive shaft and as the rollers24 rotate, the disk. 5I Twill rotate, together with the post 52.r Pressure mustbe. applied-in`'order to roll the 'marginal portion of the disk I and sharpen the same. In' order todo so', there has been provided. a-cup' 68 .which from the upper bearing block t5. intermediate the length of the cross beam or head. block 4I2 and this cup or cylinder slidably receivesv a. block or piston 69 which is provided with sealing rings ID to insure a. close t. Apassage 'II is bored through theA center of the piston 6.91 and. continued upwardly through the upper plate 2 Vand cross: beam I2 to receive the threadedv shank or neck of a gage 12 by means'of which pressure vexerted is to, be determined. A side passage 13' leads from'the passage 'II to the inner side: faceof the cross beam or head block and in this sidenpassage is' engaged one end of a pipe '14, the other end of which is connected with a pipe I5 Vextending vertically of the frame with its lower' end` portion passing through an opening formed in the base plate I. A branch 'I6 controlled by a valve 'I'I extends from the upper end of the' pipe T5 and is threaded into an openingA formed in a side'of the adjacent corner post or' pillar 4 so that oil or other liquid may ow through this branch pipe and into the interior of the pillar which constitutes a reservoir for the'liqui'd. At its lower' end, the pipe 15 is extended toward 'the lowerend of the pillar, as shown at 18, and terminates in an elbow 'I8 which is screwed into the lower end of theY plug I4. Referring to Figure 6 it will befseen that thefplug I4 is formed'l with Ya center bore into which the elbow I9 is screwed and that this bore is extended upwardly through a plunger or piston 80 about which is slidably engaged a cylinder 8I having a hollow shaft 82, the upper -end of which is screwed into a socket 83 at the lower end of a pump rod or dasher 84. Avalve ball 85 for yieldably closing the reduced inletfopening 86 and the upper end of the bore of the plugand` piston is yieldably. held closed by aspring 8l', the lower end of which bears against the elbow HLv There-f fore, liquid may be forced past the valve 85 and upwardly through the pipe "I5, but the liquid will be prevented from returning,- to the reservoir through the opening 86. ,A hollow seat 88 is threaded into the lower end of theshank 82 and constitutes asupport for the lower: end of a spring 89 which holds a valve ball 90 in'closing relation to an inlet 9| which extends upwardly .from the upper end of the chamber 92 formed in the hollow shaft and has side ports'93 whichopen' through y side portions of the shank a short distancevbelow the upper end thereof. 'I'heupper end portion of the pump rod 84 slides through the. bushing I3 which forms a tight jointjabout thepump rod and at its upper end the pump rod is forked, as shown at 94, and 'pivoted to an. operating handle or lever 95 which extends longitudinally of the cross beam I2 and at one end is pivoted to a fulcrum 9G carried by an end ofthe cross beam which projects from the top plate 2 of the frame;

By swinging the lever Vupwardlyfto raise the pump rod, the cylinder 8| will bedrawn-upwardly and as this cylinder: is drawnupwardly, :oilwill be sucked through the inlet 9 I' tofll the chamber 92 and interior of the cylinder. Presssure will then be exerted to` force thexlever downwardly; and during this movement, the cylinderwillf move downwardly above Vthe pistonv or plunger 8E). and oil in the cylinder will Ybeforced past theV valve ball 85 into the bore of Ythe pistoni and upwardly through-'the pipe 15. The valve 'I'lfr will be closed andgftherefore. when' the oil orother liquid reachesltheJupper end of the pipe 'Ii'it will pass through the pipe 'I4 and passages 'I3 and v'II'into the bottom of the cylinder 68 where it will act against theV under' face of ther piston ISS.y and exert pressure which will force the bearing blocks carried by the standards. or'columns 4 downwardly. Therefore, the shaft 2t carrying the upperv roller 24 will be forced toward the lowerrol-ler and pressurefwi'll beapplied to the marginal portion of the disk 5I which is engaged Vbetween these' rollers. The rollers 24 tapertoward their outer ends, as clearly shown inV Figures Zand 3, and, therefore, asthe rollers` 24 rotate and the disk is turned, the marginal portion of thedisk will Vbe flattened in a direction to form a feathered edge'. As. themarginal edge of the disk is flattened, it may be shifted closer tothe rollers to cause its marginal portion to extend between the rollers a greater distance and the lever may be actuated to impart greater pressure if found necessary. A portion of the liquid entering the cylinderv 68 will move upwardly "through the boreill to operatethe. gage l2 and by observing the gage, the operator ofthe machine can. determine whether or not sufficient pressure has been applied'. When a disk has been fully sharpened, pressure upon the bearing blocks mustfbe relieved in orderto permitthe upper roller 24' to move away from the lower roller and? allow the disk tov be withdrawn from between 'the rollers.' In order to `accomplish this, it is merely necessary to open Ythe valve I'I'andfliquid in the pipe'IlI and cylinder 68'may then dra-in through the branch pipe 'I6 and back intothe reservoir. It will thus bei seen that thisma'chine is so constructed. that a disk such as used upon plowsV and harrows maybe. very easily Arolled to restore Aa sharp edge and that heating ofthe disk will not. be necessary and also it' maybe sharpened without. grinding.

. Having thus described the invention, what is claimed as new is:

1.Y A disk rolling. machineV comprising a frame, including corner posts, one corner postbeing hollow and constituting a reservoir for liquid, bearings carriediby the' corner posts and shi'ftable vertically,.rollers having shafts journaled through the bearings, means for rotatably supporting-a. disk withY a. marginal portion of the disk engaged between the rollers, .and mean-s for imparting hydraulic pressure to the bearings for urging one roller toward the yother including a vpump for withdrawing liquid from the hollow-corner post, andoperating means for said pump.

2.. A disk rolling, machine comprising a frame, rollers at one side of said frame, bearingsfor said rollers shiftable vertically in said frame, means for rotatably supporting a disk and shifting the disk toward and away fromfthe rollers, and means for applying hydraulic pressure for urging the bearingsand rollersV vertically toward each other including a vertically disposed liquidv holding reservoirV slidably engaged by certain of the bearings, ar pump inV said reservoir having a. shaft projecting upwardly'from the reservoir above the frame, .and manually actuated-.means 'carried-by said frame and engagedwith the upperend` of the pump shaft for operating the same.v 3. A disk rolling machinecomprising-'a frame including standards, one standard being` hollow and constituting a liquid reservoir, bearings by said, standards and shi-ftable vertically, rollers having shafts journaled through said bearings, a' piston and cylinder in operative relation tozone bca-ring, means for rotatably supporting a disk in Cil position for disposing the marginal portion of the disk between the rollers, a pump for withdrawing liquid from said reservoir, an outlet pipe for said pump for delivering liquid into said cylinder, a valve controlled branch for said pipe communicating with said reservoir, and means for operating said pump and forcing liquid through the pipe into said cylinder and `urging one roller toward the other.

4. A disk. rolling machine comprising a frame having upper and lower plates, corner posts between said plates, one post being hollow and constituting a liquid reservoir, bearings carried by companion posts and shiftable vertically, rollers having shafts journaled in said bearings, a cross beam above one bearing, a cylinder and a piston between the cross beam and last-mentioned bearing, a pump for withdrawing liquid from said reservoir, a pipe leading from said pump to said cylinderhaving a valve controlled branch communicating with the reservoir below the cylinder, and means for operating said pump and forcing liquid through the pipe to the cylinder and exerting hydraulic pressure for forcing the rollers into compressing engagement with the marginal portion of a disk disposed between the rollers.

5. A disk rolling machine comprising a frame having;a base, posts rising from the base, a top supported by said posts, one post constituting a reservoir, bearings extending between companion posts and shiftable vertically, rollers having shafts journaled in said bearings, a cross beam carried by certain of said posts, a cylinder and piston disposed between the cross beam and a bearing under the same, means to rotatably support a disk in position to have its marginal portion engaged between the rollers, a pump in said reservoir having a shaft extending upwardly from vthe reservoir above the cross beam, a service pipe leading fromv said pump to said cylinder and having a valve controlled branch communicating with the reservoir below the cylinder whereby liquid may drain from the cylinder into the reservoir when the valve is open, and an operating lever pivotally connected with .the cross bearnandconnected with the upper end ofthe pump shaft for operating the pump and forcing liquid to the cylinder and applying hydraulic pressure for forcing one roller toward the other.

6. A disk rolling machine comprising a frame including a base plate, a top plate, posts extending betweeen said plates, one post being hollow and constituting a liquid reservoir, sets of bearings extending between companion posts one above another, the bearings of one set being shiftable vertically, shafts journaled through said bearings, rollers carried by said shafts, means for transmitting rotary motion from one shaft to another; a, drive shaft rotatably supported upcn'the top plate, means for transmitting rotary motion from the drive shaft to the lastmentioned shaft, means for rotatablyrsupporting a disk in position for engagement of its marginal portionY between rollers, ai cross beam disposed over the shiftable bearings in spaced relation to the upper one thereof, a cylinder and piston disposed between the cross beam and uppershiftable bearing, a pump in said reservoir having a pump shaft extending vertically and protruding from the upper end of the reservoir, a service pipe leading from said pump to said cylinder and having a valve controlled branch communicating with the reservoir below the cylinder, av 'fulcrum carried by said cross beam, and an operatinglever pivoted tothevfulcrum and engaged with the upper end of the pump shaft.

"7.y A disk rolling machine comprising a.v frame, bearings shiftable vertically in said frame and disposed one above another, rollers having shafts journaled through said bearings, a piston and cylinder for operating against the upper bearing, a reservoir, a pump in the lower portion of said reservoir, a service pipe for delivering liquid from the pump tothe cylinder and lhaving a valve controlled branch communicating with thereservoir abovethe pump and 'below the cylinder whereby liquid may drain from the cylinder throughthe branch pipe back into the reservoir when the valve of the branch pipe is open, manually actuated means for operating said pump, and means for rotatably supporting a disk in position to-have, its marginal portio engaged ibetween the rollers.

8. A disk rolling machine comprising a frame, bearings in the frame shiftable vertically therein and disposed one above another, rollers-having shafts journaled through the bearings, means for rotating said rollers, means for Vapplying pressure to the upper bearing and forcing one roller toward the other, a bar slidably carriedby said frame with one end projecting therefrom, means to-secure .said bar in 'a longitudinally adjusted position, a bracket connected with-the outer end portion of saidbarv for angular and transverse adjustment, a support carried by said bracket and vertically adjustable, and means carried by said support for rotatably mounting a disk with a marginal portion of the disk engaged between the rollers. v f

9. A disky rolling machine vcomprising a frame, rotatable rollers carried by said frame and disposed one above the other ata side of the frame, means for rotating said rollers, means for applying pressure and forcing one roller toward the other, a bar carried by said frame with one end portion projecting outwardly therefrom, the bar being -shiftable longitudinally and adapted t be secured in a set position, a clamp carried by the outer end of said bar, .a bracket carried by said clamp and extending transversely of the bar, a support having a standard engaged by the .bracket and shiftable. vertically therethrough to vertically'adjust the support, and means for rotatably mounting a disk carried by the upper end of said support and shiftable vtoward and away fromsaid rollers. u

10. A disk rolling machine comprising a frame, rollers carried by said frame, means for exerting pressure and forcing one roller toward the other,

a bar having one end portion projecting from said frame, bearing brackets carried by said frame for supporting the bar in a longitudinally adjusted position, a groove being formed inthe bar, a disk carried by one bearing bracket and engaged in vthe groove to control longitudinal shifting ofthe bar and prevent rotation thereof, a clamp carried by the outer end of said bar, a bracket extending transversely'of the barand engaged bysaid clamp for angular adjustment ofthe bracket, a support carried by said bracket and shiftablevertically, and means carried by said support `to rotatably mount a disk with a marginal portion of the disk disposed between said rollers. i i Y 11. A disk rolling machine comprising a frame, rollersk carried by said frame, means for rotating said rollers, means for exerting pressure and forcing one troller toward the other, a bar projecting from said frame and adjustable longitudinally, a bracket carried by said frame for angular adjustment, a support having a table and a standard ldepending therefrom and carried by said bracket, a carriage upon said table and pivoted eccentric thereto, rotary members carried by said carriage, a ,post journaled through said carriage concentric thereto and projecting upwardly from the carriage, means to secure a disk to be sharpened about the post in position to rest upon said rotary members with its marginal portion engaged between the rollers, means for moving said carriage about its pivot to shift the disk toward and away from the rollers, and means for securing the carriage in a set position.

LUTHER T. PEDIGO. 

